Yieldable driving-gear.



No. 895.502. 1 PATENTBD AUG. 11, 1908.

' l W. G. SGHAEPPBR.

111121.1111'13111: DRIVING GEAR.

APPLGATION FILED APR. 10,908.

l. 4%; hmmg UNITED STATE-s Pif-i TENT OEEICE..

WILLIAM G. SCIIAEFYER, OF READING, PENNSYLVANIA, ASSIGNOR TO READINGSTAND/KRD COMPANY, OF READING, PENNSYLVANIA, COPQRATION OF PENNSYLVANIA.

YIELDABLE DRIVING-GR;\

. v To ail 'whom zt may concern.:

lowing isa specification.

.\Iy invention relates to that class of yieldable wheels in which anindependently rotatable rim section is frictionally connected bysuitable clamping means to an inner wheel section, 'and more articularlyto improvements in the type indicated in my ending application, Ser. No.401,017, filed November 6th, 1907.

The main objects of my present invention are to more perfectly secureand maintain the proper centering of the separately movable rini sectionupon the inner section, by providing for a satisfactory connectionbctween t-lie sections inde )endently of the frictioiial clamping meansheretofore employed; and also to so improve the frictional connectionbetween the sections as to insure more satisfactory operation andreduced labor and cost for maintenance.

The invention is fully described in connection with the accompanyingdrawings and its novel features are specifically pointed ont in theclaims.

Figure 1 is a cross-sectional view, on the line 1-1 of Fig. 2, of acomplete wheel cmbaodying my improvements. Fig. 2 is a face view of thesame, a portion of one clamping plate being broken away to show thcjunction of the sect-ions. Fig. 3 is a cross-section of theindependently connected wheel sections, before the frictional clampingmeans shown in F ig. 1 are applied thereto.

In the drawings ay represents an inner wheel lsect-ion of circular form,provided as' shown with a central screw-threaded opening E' for securingthe same to a shaft: c is the outer or rim section rotatably mountedupon the periphery of the inner section r.: d are oppositcly arrangedannular clamping plates covering the circular junction of the sections;and e. areclamping bolts passed tiansversely through the plates (l d andinner section a; these elements being similar in general form andarrangement to those shown in my rior application referred to, butdiffering t ierefrom in important features as hereafter described.

Specification of Letters Patenhs R Application led April 10, 1908.

Patented Ang.- 11, 1908.

serial No.' lciegos. I

In my prior construction the rim section c is centered upon and rotateson the periph- `cry of the inner section (1, but the two sections, beingconnected only through the frictional clampino' means, are held onlybythe latter', and are iablc in practice to he slightly displaced andsubjected to strains which tend to vary the uniform frictionalresistance intended to be provided by the clamping means, and tonecessitate attention which it is highly important to avoid. Inovercoming these dilliculties I provide in the first place forindependently connecting the two sections in proper relative position,this being accomplished as shown by providing racegrooves in the opposedperipheries a.' c' of the two sections, into which a series ofantifriction balls f is introduced, one at `a time, through 'a suitablelateral opening f; said balls, when in place, serving to connect theouter section' c to t-he inner section a in pro )er concentric andlateral positions, wh' e at the same time insuring easvwrotation of onesection upon the other. With the sections thus independently' connectedthe function of providing uniform frictionalresistance to t te rotarymovement of one scction upon the other is provided for as follows: Theannular clamping plates d d, which are preferably made of hard bronzemetal adapted for direct frictional contact with the. movable wheelsection c, are formed with flanges d at their inner peripherics and areaccurately bored to fit upon circular shoulders ior offsets c2 a.2formed upon the opposite faces of the section a.. The outer portions ofthe plates which overlap the riin section c, are cach provided on theirinner faces, as shown, .with an annular friction projection or bead d2adapted to fit a corresponding annular recess c2 1n the opposingrim-section face. The two plates d d are rigidly connected to the innersection ay by the transverse clamping bolts e, and are at the same timepressed into frictional engagement with the rim section c to provideproper frictional resist-ance to separate rotary movement of the latter.Provision is made for proper lubrication by forming grooves d3 in thecontact-ing friction surfaces, connecting with the chambers g formedbetween the plates and the wheel sections, to which. chambers thelubricant may be introduced through a suitable opening h.

The advantages of my improved construct I'r tion as previously pointedout will be readily seen, and the preferred construction specificallysliomi and described may be modified itithin thefspirit of my invention.

1. A. wheel comprising a circularinner section, a separately rotatableriin section and anti-friction balls entered in opposing peripheralrace-grooves in said Sections, oppositely arranged annular clampingplates covering the circular unctioii line of the two sections, andtransverse clamping bolts whereby one of said sections is rigidlyconnected to said plates and the ot-her section yieldingly conconnectedto said plates and the outer sec-` tion yieldingly connected to thesaine by `frictional engagement with vthe portions thereof overlappingsaid outer section sub'- stantially as set forth.

-3. Awheel comprising a circular inner section, a separately rotatableriin section and anti-friction balls entered in opposing peripheralrace-grooves in said sections, oppositely arranged annular clampingplates covering'the circular unction line of the two sections and havingflanged inner peripheries fitted upon Ycircular offsets on the oppositefaces of the inner section, and transverse clamping bolts rigidlyconnecting said inner section to said pates, the meeting faces of theouter section and of the plate portions overlappinlr said section beingprovided with fitted annu ar projections and grooves adapted to providefrictional connection between tliein substantially as set forth.

In testimony whereof, I aflix my signature, in the presence of twowitnesses.

IVILLIAM G. SCHAEFFER. Witnesses:

D. M. STEWART, W. G. STEWART.

